Thousands of young adults thronged the National Mall on Friday to protest abortion and cheer speakers who called for overturning the 40-year-old landmark Roe v. Wade Supreme Court decision.

Protesters — drawn by social media and church youth groups — flocked to the annual March for Life despite subfreezing temperatures and snow in the forecast.

“We are winning with young people. I see it right in front of me today,” said organizer Jeanne Monahan, president of the March for Life Education & Defense Fund.

As one abortion opponent after another addressed the crowd, Congressman Chris Smith of New Jersey drew the loudest applause with an attack on the court ruling: “Forty years ago this past Tuesday marks the Supreme Court’s infamous, reckless and inhumane abandonment of women and babies to the abortionists.”

“Know this, Mr. President — we will never quit,” Smith said before the marchers took off on their route down Constitution Avenue toward the Supreme Court building on Capitol Hill.